Cannot set section texts (names) in style manager

[kla-ko]

I want to change style manager section names. The documentation tells me that there is a method setName() for doing this. So I've tried this:

editor.StyleManager.getSector('general').setName('Allgemein');

If I'm doing this in my own plugin, then I'm getting the error TypeError: Cannot read properties of null (reading 'setName'). The reason is that editor.StyleManager.getSector('general') equals to null, although editor.StyleManager.getSectors() returns a meaningful result containing all used sections.

If I'm calling setName() after editor initialization, it runs through but shows no effect on the UI.

Did someone ever did such a thing?

Thanks,